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Bahrain GP: Practice notes - Pirelli

NEWS STORY
20/04/2012

Mercedes driver Nico Rosberg carried on where he had left off, following his pole position and debut victory in China last week, by setting the fastest time of the day during free practice in Bahrain. Rosberg set his fastest time of 1:32.816 on the P Zero Yellow soft tyre during the second free practice session, which was characterised by high track temperatures. The P Zero White medium tyre has also been nominated for Bahrain.

The Sakhir circuit reverted to the original layout that had last been used in 2009, before a longer loop was added for the 2010 race between turns four and five. This gives the circuit a faster and more flowing configuration, with 15 corners as opposed to 23, which puts the emphasis on traction as well as the front-left tyre in particular.

A typical hallmark of Bahrain is the sand that blows onto the track from the surrounding desert, and this was very much in evidence during the first free practice session this morning: although to a lesser extent than many of the teams had anticipated. The effect of the dust is to make the cars slide more, which increases thermal degradation and slows down the lap time. McLaren driver Lewis Hamilton set a fastest time of 1:33.572 in the middle of the hour and a half morning session, using the Pirelli P Zero White medium tyres. The Force India team was the only team to use the P Zero Yellow soft tyres in the morning, placing third with Paul di Resta and sixth with Nico Hulkenberg.

Temperatures climbed progressively during the day, with the second free practice session in the afternoon starting with 31 degrees centigrade of ambient temperature and 40 degrees track temperature. As the session went on the track temperature fell again after reaching a peak, when Rosberg set his fastest time. These are the conditions that are likely for qualifying and the race, meaning that all the teams ran both compounds extensively during free practice two in order to accumulate as much data as possible.

Williams driver Pastor Maldonado was the first to switch onto the P Zero Yellow soft tyres, 20 minutes into the second session, followed progressively by the other runners. With half an hour to go, many teams concentrated on long runs with high fuel: some splitting the work by running one car on soft tyres and the other on medium tyres, to cover every possibility.

Rosberg once again demonstrated his ability to get the most out of his P Zero tyres at the peak of their working range, setting a fastest time that was nearly half a second faster than the next-quickest driver, Red Bull's Mark Webber.

Paul Hembery: "The sand on the track - a phenomenon that we are well aware of, following our tests in Bahrain in the past - limited the useful running in the morning, but it was a much busier session in the afternoon with all the teams running both compounds in order to make up for any lost time earlier. The teams will all have been looking closely at the effect of track temperature on performance, which is going to form an integral part of their strategy for qualifying and the race, as well as monitoring degradation. From what we can see so far the pace of both compounds is around 0.6 seconds apart and degradation is in line with expectations. But we still have a lot of data to go through tonight before we can accurately predict how long the stints are likely to be on each tyre, as this is the first time that we are here in race conditions."

Sets used overall:

Medium 55
Soft 25
Intermediate 0
Wet 0

Highest number of laps per compound:

Medium 15
Soft 16
Intermediate 0
Wet 0

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